Malicious PDF — malware analysis report

Static analysis result for SHA-256 4564ef45f1d18219…

MALICIOUS

PDF

65.9 KB Created: 2021-03-16 07:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d3c8933308775c7f387251da4fe84278 SHA-1: a0b48ffac144b403d15bb71f5756b093c4f8a589 SHA-256: 4564ef45f1d18219cfc96d3271cc848222c6be861d2780918eb10a94446cd5f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains multiple embedded URLs, including one pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to changing a belly button ring, suggesting a lure to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=how+to+change+a+tight+belly+button+ring PDF link annotation
    • http://mamafiposorugul.sportsontheweb.net/bafang_bbs02_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/ahhDmiW/taxelepa.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/xbjgiaX/warzone_2100_campaign_mods.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/85385888383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubuzezaw.rf.gd/mapa_mundi_download.pdfIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_4743d673cab74624ad614fd0c1120ed9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce65924f-56b9-4481-8f50-5409c8d831e0/how_do_i_program_my_comcast_remote_without_a_code.pdfIn PDF document text
    • http://melamepapate.rf.gd/what_comes_in_the_gta_v_premium_online_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ea958e-3f23-48c0-98fc-0a739d380a5c/96693826029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549a8ae4-73bc-495d-8f8e-5873263b8017/hp_officejet_4500_wireless_software_for_mac.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_d9a5caa0000c4829af072a81d0da7e5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zosevid/vuxoluraninu.pdfIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_e91b8dc93caf4e86843314ed6ec342b2.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_7478bf95d6d64535806ca2df157fbbe3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/characteristics_of_effective_leader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f071cfc-ae02-4966-a68a-054b0f0f394f/wedolesomuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21344afa-d7a3-48da-a6c1-98daf5f7b661/vw_tiguan_diesel_service_intervals.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C0 5176 bytes
SHA-256: 4392f49ae39474666bf388e861b586546b82a9aee1db553b593f5e4f9fb0453e
font_01_sfnt_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 9776 bytes
SHA-256: efae2f6a189d09b6d1f0268f172093c6683f69b62ab57ca37960494143a63c47

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